AU457339A - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
AU457339A
AU457339A AU4573/39A AU457339A AU457339A AU 457339 A AU457339 A AU 457339A AU 4573/39 A AU4573/39 A AU 4573/39A AU 457339 A AU457339 A AU 457339A AU 457339 A AU457339 A AU 457339A
Authority
AU
Australia
Prior art keywords
telephone systems
telephone
systems
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
AU4573/39A
Other versions
AU111702B2 (en
Inventor
Ernest Lomax Clarence
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
X Associated Electric Laboratories Inc
Original Assignee
X Associated Electric Laboratories Inc
Filing date
Publication date
Application filed by X Associated Electric Laboratories Inc filed Critical X Associated Electric Laboratories Inc
Application granted granted Critical
Publication of AU111702B2 publication Critical patent/AU111702B2/en
Publication of AU457339A publication Critical patent/AU457339A/en
Expired legal-status Critical Current

Links

AU4573/39A 1939-10-05 Improvements in telephone systems Expired AU111702B2 (en)

Publications (2)

Publication Number Publication Date
AU111702B2 AU111702B2 (en) 1940-10-24
AU457339A true AU457339A (en) 1940-10-24

Family

ID=

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